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One more bit of info on the linker error on my .mm test program: I confirmed that libobjc.so has the symbols, e.g.,
(ALSI8)dlobron@bos-lps80:~/build/clangport/akamai/common/lib$ nm -C libobjc.so|grep objc_autorelease
00000000000204b0 T objc_autorelease
00000000000200f0 T objc_autoreleasePoolPop
000000000001fc90 T objc_autoreleasePoolPush
00000000000204f0 T objc_autoreleaseReturnValue
I'm linking with the library:
/home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang -std=gnu99 -fexceptions -rdynamic CMakeFiles/CXXException.dir/CXXException.mm.o -o CXXException -Wl,-rpath,/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/build
../libobjc.so.4.6 -lstdc++ ../libobjcxx.so.4.6 -L/home/dlobron/build/clangport/akamai/common/lib -lobjcxx
-lobjc
But the symbol is still not found:
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `_i_Test__autorelease':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0x98): undefined reference to `objc_autorelease(objc_object*)'
Full linker error below.
Linker error when trying to add a .mm version of CXXException to the tests:
(ALSI8)dlobron@bos-lps80:~/build/clangport/akamai/libobjc2/libobjc2-1.8.1/build/Test$ /home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang -std=gnu99 -fexceptions -rdynamic CMakeFiles/CXXException.dir/CXXException.mm.o -o CXXException -Wl,-rpath,/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/build ../libobjc.so.4.6
-lstdc++ ../libobjcxx.so.4.6 -L/home/dlobron/build/clangport/akamai/common/lib -lobjcxx -lobjc
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `_i_Test__autorelease':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0x98): undefined reference to `objc_autorelease(objc_object*)'
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `_i_Test__retain':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0xc8): undefined reference to `objc_retain(objc_object*)'
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `_i_Test__release':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0xf8): undefined reference to `objc_release(objc_object*)'
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `_c_NSAutoreleasePool__addObject_':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0x149): undefined reference to `objc_autorelease(objc_object*)'
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `finally()':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0x18d): undefined reference to `throw_int()'
CMakeFiles/CXXException.dir/CXXException.mm.o: In function `main':
/home/dlobron/build/clangport/akamai/libobjc2/libobjc2-1.8.1/Test/CXXException.mm:(.text+0x3a2): undefined reference to `catchall()'
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